/**
 * 对获取的state 做一些映射  （类似于计算属性）
 */

 export const singer = state => state.singer

 export const playing = state => state.playing

 export const fullScreen = state => state.fullScreen

 export const playlist = state => state.playlist

 export const sequenceList = state => state.sequenceList

 export const mode = state => state.mode

 export const currentIndex = state => state.currentIndex

 export const currentSong = (state) => {
     return state.playlist[state.currentIndex] || {}
 }

 export const disc = state => state.disc

 export const topList = state => state.topList

 export const searchHistory = state => state.searchHistory

 export const playHistory = state => state.playHistory

 export const favoriteList = state => state.favoriteList
